Opticians, dispensing, opthamologists and any eye care profession all ha some basic tools. Tey use a small opthascope to look into the eyes.
Diabetes and diabetic conditions create small amounts of blood to seep into the aqueous humor.
When an optician or opthamologist looks into the eye they can tell howuch damamge there is on the blood vessels and how much discoloration there is in the fluid
Diabetes also changes the sclera or membrane covering of the eyeas well.
Small nuances and reaction time to lens change can also be indication of diabetes.
Slit light is a high intensity light that either doctor now uses to show more of teh blood vessels, retina and back of teh eye.
Thsi si actuallya good way to determine if known diabetics are in good control or just " lying" about their control.
Also looking into the eye can tell if mini strokes have occurred.
julie